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TransView Test View
The software module for testing measurement transducers allows for manual or automatic testing of any measurement functions, such as
- Real power single- or three-phase
- Reactive power single- or three-phase
- Apparent power single- or three-phase
- Frequency
- Current
- Voltage (phase-to-ground, phase-to-phase)
- cos phi
- Phase angle (V-I, V-V, I-I)
- dc quantities (current, voltage, power)
- Signed average of currents
Trans View: Curve View
The module supports testing of the following types of characteristics:
- Linear
- Compound
- Quadratic
- Symmetrical or non-symmetrical
The definition of the characteristic corresponding to the test object settings is easy and is displayed graphically. A default test setting is derived from the test object definition, facilitating the definition of an automatic test of the transducers characteristic.
TransView: Static Output
The "manual test” mode is used, if a measurement transducer is to be readjusted. Every desired input quantity can be generated for the transducer. Furthermore, it is easy to switch between significant points of a characteristic, where the error of the transducer is shown at a certain input value.
An automatic test includes the sequential output of a pre-defined test point table, as well as the documentation and assessment of the results.
Here, the test points represent the input value of the measurement transducer. In addition, the behavior at changing input voltage or frequency can be performed as an option.
The error of a transducer is determined by comparing the theoretical signal and the actually measured output signal. Relative, absolute and class errors are derived and graphically displayed in a diagram. If multiple test runs are performed, the average error is indicated.
Single test points or test sequences can be added to the test point table. The table includes:
- Input value
- Output value
- Class error
- Assessment (test passed or failed)
During the automatic test run all test points are processed in a sequence. The transfer characteristic including all test points (passed or failed) is displayed graphically. If remote displays should be checked during the test run, the test can also be controlled manually.
Measuring transducers for three-wire (Aaron circuit) as well as four-wire systems can be tested. Current as well as voltage can be generated as pure sine signals or superimposed with harmonics or dc components.
New generation transducers often no longer have classical mA or Vdc output. They rather transmit the measured data via transfer protocol or/and visualize values at a display. The mode "open loop testing" supports testing this type of transducer.
To achieve higher accuracy for calibration and testing it is recommended that the CMC 256plus, CMC 156 EP or CMC 256 EP (Extended Precision) is used.